package com.imooc.test;

public class Goods {
    private int CommodityNumber;
    private String TradeName;
    private float CommodityPrice;
    private String ProductDescription;
    public Goods(){}
    public Goods(int CommodityNumber,String TradeName,float CommodityPrice,String ProductDescription){
        this.CommodityNumber = CommodityNumber;
        this.TradeName = TradeName;
        this.CommodityPrice = CommodityPrice;
        this.ProductDescription = ProductDescription;
    }
    public int getCommodityNumber() {
        return CommodityNumber;
    }

    public void setCommodityNumber(int commodityNumber) {
        CommodityNumber = commodityNumber;
    }

    public String getTradeName() {
        return TradeName;
    }

    public void setTradeName(String tradeName) {
        TradeName = tradeName;
    }

    public float getCommodityPrice() {
        return CommodityPrice;
    }

    public void setCommodityPrice(int commodityPrice) {
        CommodityPrice = commodityPrice;
    }

    public String getProductDescription() {
        return ProductDescription;
    }

    public void setProductDescription(String productDescription) {
        ProductDescription = productDescription;
    }
    public void display(){
        System.out.println("商品信息：" + this.ProductDescription);
    }
    @Override
    public String toString() {
        return "Goods{" +
                "CommodityNumber=" + CommodityNumber +
                ", TradeName='" + TradeName + '\'' +
                ", CommodityPrice=" + CommodityPrice +
                ", ProductDescription='" + ProductDescription + '\'' +
                '}';
    }
}

相关代码：

​package com.imooc.test;

import java.lang.reflect.Constructor;

public class Test {
    /**
     * 通过Constructor获得无参构造方法，并得到Goods类的对象，然后调用display()方法
     */
    public void zybc1() throws Exception {
        Class class1 = Class.forName("com.imooc.test.Goods");
        Constructor c = class1.getConstructor();
        Goods goods =(Goods) c.newInstance();
        goods.display();
    }
    /**
     * 通过Constructor获得有参构造方法，并得到Goods类的对象，然后输出该对象
     */
    public void zybc2() throws Exception {
        Class class1 = Class.forName("com.imooc.test.Goods");
        Constructor c = class1.getConstructor(int.class,String.class,float.class,String.class);
        Goods goods =(Goods) c.newInstance(002,"手机",3000.0f,"黑的，内存80g");
        System.out.println(goods);
    }

    public static void main(String[] args) {
        Test test = new Test();
        try {
            test.zybc1();
            test.zybc2();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}